Any bright ideas? Train ideally but open to ferry. We like a city break to somewhere with an old town we can wander round, no doubt a handsome castle, cathedral etc. Good art gallery wouldn't go amiss.
I'd love Lisbon but I think that's going to take too long and cost too much for us right now. Waiting to hear back from operators on that. Just been looking at Vienna, promising but I feel like there could be some really interesting cities that we're not thinking of.
Open to making two centre or having a stop off to break the journey.